Datasheet AD7981 (Analog Devices) - 2

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AD7981 Data Sheet TABLE OF CONTENTS
Features .. 1 Analog Input ... 16 Applications ... 1 Driver Amplifier Choice ... 16 Typical Application Circuit ... 1 Voltage Reference Input .. 17 General Description ... 1 Power Supply ... 17 Revision History ... 2 Digital Interface .. 17 Specifications ... 3 CS Mode, 3-Wire Without a Busy Indicator... 18 Timing Specifications .. 5 CS Mode, 3-Wire with a Busy Indicator ... 19 Absolute Maximum Ratings .. 6 CS Mode, 4-Wire Without a Busy Indicator... 20 ESD Caution .. 6 CS Mode, 4-Wire with a Busy Indicator ... 21 Pin Configuration and Function Descriptions ... 7 Chain Mode Without a Busy Indicator ... 22 Typical Performance Characteristics ... 8 Chain Mode with a Busy Indicator .. 23 Terminology .. 13 Applications Information .. 24 Theory of Operation .. 14 Printed Circuit Board (PCB) Layout ... 25 Circuit Information .. 14 Outline Dimensions ... 26 Converter Operation .. 14 Ordering Guide .. 26 Typical Connection Diagram.. 15
REVISION HISTORY 7/2017—Rev. A to Rev. B
Changes to Figure 12... 9 Change to Conversion Time: CNV Rising Edge to Data Available Added Figure 15 .. 9 Parameter; Table 3 .. 5 Changes to Figure 18 and Figure 21 .. 10 Added Figure 22 and Figure 23 .. 10
10/2016—Rev. 0 to Rev. A
Change to Figure 26 ... 11 Added 10-Lead FLATPACK .. Universal Added Figure 27, Figure 28, Figure 29 .. 11 Changes to Features Section and General Description Section . 1 Added Figure 33 and Figure 34 .. 12 Changes to Integral Nonlinearity (INL) Parameter, Table 1 ... 3 Change to Figure 35 Caption ... 12 Changes to Power Dissipation Parameter and Temperature Changes to Circuit Information Section ... 14 Range, Specified Performance Parameter, Table 2 ... 4 Updated Outline Dimensions ... 26 Changes to Table 4 .. 6 Changes to Ordering Guide .. 26 Added Figure 5; Renumbered Sequential y .. 7 Changes to Figure 6, Figure 7, and Figure 8 ... 8
10/2014—Revision 0: Initial Version
Added Figure 9, Figure 10, and Figure 11 ... 8 Rev. B | Page 2 of 26 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUT DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE \CS MODE, 3-WIRE WITHOUT A BUSY INDICATOR \CS MODE, 3-WIRE WITH A BUSY INDICATOR \CS MODE, 4-WIRE WITHOUT A BUSY INDICATOR \CS MODE, 4-WIRE WITH A BUSY INDICATOR CHAIN MODE WITHOUT A BUSY INDICATOR CHAIN MODE WITH A BUSY INDICATOR APPLICATIONS INFORMATION PRINTED CIRCUIT BOARD (PCB) LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE